[Amps] Jennings UCS puller interchangeability ?

[Jim Thomson]

Date: Mon, 2 May 2011 17:36:58 -0700
From: "Jim W7RY" <w7ry at inbox.com>
Subject: Re: [Amps] Jennings UCS puller interchangeability ?


The end of the shaft sizes are 1/4" and 3/8" .  The cap itself has 1/4-28 
threads (1/4" 28 threads per inch).  Most of the "nose cones" are the same 
size.

Sometimes the 3/8" shaft end is just an adapter installed onto/over the top 
the 1/4" end shaft.

####  I have several of the jenning's vac caps... and some are 1/4"- 3/8"- and also 1/2" shafts. 
 [ this is the end portion that have to mate to].  Since my shafts through the front panel turns counter's
are all 1/4" SS.... and adaptor has to be used.... like 1/4- 1/4    or  3/8- 1/4    or  1/2- 1/4. 
I was given a few really nice adaptors... and have never seen em since.   These were like a small bellows  affair
in the middle of the adaptor..... sorta accordian type....and were cylindrical in shape.  The ones given to me took
a 1/2"  shaft [with set screws] on one end... and took a 1/4' shaft  [ with set screws]  on the other end.  These
adaptor's  were the best yet..since they would easily allow  for a small amount of shaft misalignment.  If anybody
knows a source  for these bellows types, let me know, as I could use at least 2 more of them. 

##  I also have a few of the solid brass adaptors, in  3/8-1/4  variety..and also 1/2- 1/4.   Those will work as well..
BUT, will not tolerate any shaft misalignment at all.   Some of the 5-20 kv shaft isolators  [ 3/8-1/4  and  1/4-1/4]
will allow for a tiny bit of shaft misalignment..and also electrically isolate the 2 x shafts. 

## In the odd place where an electrical shaft isolator is required, but the standard shaft isolator won't fit,due to space
constraints, then  a solid  1/4"  diam  fiberglass  rod can be used instead. 

Later... Jim   VE7RF        

Hope this helps.
73
Jim W7RY